Incorrect Billing

in Dec 15 a week before my debit order date I called in to dstv requesting them to downgrade my package I reconfirm with the guy asking if they will debit the R425 or the R699 the guy reassured me that only R425 will be debited on the 25th Dec my package was downgraded bt funds was not the still debited my account R699 I called the bank n asked to reverse the debit the same day I went into the date branch n paid the R425 Jan 2016 I called dstv asking what had happen they gave me some ******** story I confirmed again with the consultant asking how much will be debited end of Jan he said R425 when ghee debit order went through R500 n odd was debited I called in they told me that I had to pay reconnection I asked for what as I paid my account the day I reversed my debit he explained it was an error n they will credit ghee R100 odd to my account, end of Feb the debited my account with R425 I called in asking why they debited 425 when I had a credit of R100 odd they gave me another bull **** story I asked for a refund about 2weeks later I call in now they telling me that the agent sent the refund to the wrong place n I have to wait another 7 days how is this my fault I want my money..